Determination of Bioavailable Contaminants in the Lower Missouri River following the Flood of 1993
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- 作者：Jimmie D. Petty ; Barry C. Poulton ; Colette S. Charbonneau ; James N. Huckins ; Susan B. Jones ; Jennifer T. Cameron ; and Harry F. Prest
- 刊名：Environmental Science & Technology
- 出版年：1998
- 出版时间：April 1, 1998
- 年：1998
- 卷：32
- 期：7
- 页码：837 - 842
- 全文大小：76K
- 年卷期：v.32,no.7(April 1, 1998)
- ISSN：1520-5851
文摘
The semipermeable membrane device (SPMD)technologywas employed to determine the presence of bioavailableorganochlorine pesticides (OCs), polychlorinated biphenyls (PCBs), and polyaromatic hydrocarbons (PAHs) in thewater of the main stem of the lower Missouri River andthree of its tributaries. The SPMDs were deployed in1994following the extensive flood of 1993. Specifically,theSPMDs were deployed for 28 days at Wilson State Park, IA;Nebraska City, NE; Parkville, MO; the Kansas River inKansas City, KS; Napoleon, MO; the Grand River; Glasgow,MO; the Missouri River upstream from the confluenceof the Gasconade River; the Gasconade River; and Hermann,MO. Contaminant residues were found at all sites andat higher concentrations than found in the earlierpre-floodsampling. For example, in the present study, dieldrinwasfound to range from a low of 110 ng/sample in theGasconade River to a high of 2000 ng/sample at Glasgow,while in the pre-flood sampling, dieldrin ranged from alow of 64 ng/sample at Sioux City to a high of 800ng/sampleat Glasgow. In contrast to the 1992 sampling,residuesof PCBs were found at all 1994 sampling sites except theGasconade River. Samples from Wilson State Park andthe Grand River had 3100 and 2700 ng of PCBs/sample,respectively. These two concentrations are about anorder of magnitude higher than the other sites and arelikelyindicative of point source inputs. PAHs were presentin SPMD samples from three sites near Kansas City.Thecontaminant residues sequestered by the SPMDs representan estimation of the bioavailable (via respiration)contaminantspresent in the main stem of the lower Missouri River andthree of its major tributaries following an extensivefloodevent.